E/MJ : engineering and mining journal . ject is discussed by M. J. Kirwan on p. 208 of the Third AnnualReport, Bull. 84, State Oil and Gas Supervisor. California State Min. Bur.,and by R. E. Collom on pp. 136-137 of the same report. casmg leaks are usually one or more of the follow-ing: Insufficient tightening of casing, collapse, de-tective wells, corrosion, or shifting formations. In di-illing a well considerable time and expensecan be saved by testing a water string, if cemented,before the plug is drilled out for a test of important feature in the preparation of a welltor test
E/MJ : engineering and mining journal . ject is discussed by M. J. Kirwan on p. 208 of the Third AnnualReport, Bull. 84, State Oil and Gas Supervisor. California State Min. Bur.,and by R. E. Collom on pp. 136-137 of the same report. casmg leaks are usually one or more of the follow-ing: Insufficient tightening of casing, collapse, de-tective wells, corrosion, or shifting formations. In di-illing a well considerable time and expensecan be saved by testing a water string, if cemented,before the plug is drilled out for a test of important feature in the preparation of a welltor test of water shut-off has been continuously em-phasized by the State Oil and Gas Supervisors If this progi-am is not followed the testtor water shut-off is not only inconclusive, but itmay be necessary to again plug the shoe of the cas-mg with cement or run a casing tester. By plugging in the shoe of the casing and makingbailing tests, the existence of a casing leak and therate of flow can be detected. By the use of a casing. L-eas/tef (Ofcfd-,Belfing) Strap, or/yot/m/^ flotfened at £nds) nge-Top Cone-Top FIG. 1. A—SWAB BAILER OR CASING TESTER TO RUN IN 8V4-IN. CASING. B—FLANGE TOP TESTER C—CONE TOP TESTER. tester, the position of the leak, as well as the rateof flow, can Ije determined. A casing tester, or swab bailer, as it is sometimescalled, can be used to determine the position defi-nitely of any one of a number of leaks. There are anumber of variations in the so-called swab-bailer orcasing tester. Fig. 1 illustrates three of the vari-eties in common use. All testers have a closedbottom. The casing must be bailed free of fluidbelow the depth to be tested. The tester is run to apredetermined depth and allowed to stand for a givenlength of time. When the tester is removed, theamount of fluid therein can be measured and the rateof leakage reduced to flow for twelve- or twenty-four-hour periods. In Well No. 7 of Standard Oil Co., Sec. 8, T. 30 S.,R. 22 E., M.
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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectmineralindustries
